[ 4 ” ] . 
The blood was let out into a cup, and w r as found 
to be fluid ; at the end of fifteen minutes above one 
half was flill fluid ; in twenty-five minutes it feemed 
to be quite jellied. Now as in this experiment a 
fimilar effect was produced, as when the vein was. 
put into water, it feems probable that it was the 
coldnefs of the water, and of the oil, which had 
leffened the difpofition of the lymph to coagulate. 
Experiment XXVI. 
Another piece of the fame vein was put into river- 
water, in which the thermometer flood at 38°, and 
was left till the next morning; when, after twenty- 
two hours and a quarter, it was taken out. The par- 
ticles did not feem to have fubfided, as in the former 
experiment ; but the vein being opened the blood 
was found to be fluid, though fo vifcid that it 
could barely drop from the vein. The cup into which 
it was received was placed upon the window of a 
moderately warm room, and was examined carefully 
from time to time ; but the blood never had any 
appearance of coagulation, but remained fluid till it 
was dried by the evaporation of its water, which hap- 
pened by the next day. In this experiment the cold 
feemed intirely to have prevented the coagulation of 
the lymph : fo ill-founded is the common opinion, 
that cold coagulates the blood. 
As the lymph can be deprived of its power of coa- 
gulating, on being expofed to the air, by fo flight 
a circumflance, as it would feem, as the cooling it 
fuddenly ; it is the lefs to be wondered at, that luch 
a change fhould fometimes take place in the blood - 
G g g 2 vefiels 
